package com.compty.paint.util;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.ImageIcon;

import com.compty.core.framework.image.IThumbnailCreator;
import com.compty.core.framework.image.ThumbnailCreatorFactory;
import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class ImageUtil {
	
	
	public static void resize(String originalFile, String resizedFile, int newWidth,int newHeight) {
		IThumbnailCreator thumbnailCreator = ThumbnailCreatorFactory.getCreator(originalFile, resizedFile);
		if( newWidth>0 && newHeight>0){
			thumbnailCreator.resize(newWidth, newHeight);
		}
	}

	/**
	 * @param originalFile 原文件
	 * @param resizedFile 目标文件
	 * @param newWidth 新尺寸宽
	 * @param newHeight 新尺寸高
	 */
	public static void resize1(String originalFilePath, String resizedFilePath, int newWidth,int newHeight) {
		float quality = 0.9f;
		try {
			if (quality < 0 || quality > 1) {
				throw new IllegalArgumentException("Quality has to be between 0 and 1");
			}
			
			File originalFile = new File(originalFilePath);
			File resizedFile = new File(resizedFilePath);
			
			ImageIcon ii = new ImageIcon(originalFile.getCanonicalPath());
			Image i = ii.getImage();
			Image resizedImage = i.getScaledInstance(newWidth, newHeight, Image.SCALE_SMOOTH);

			// This code ensures that all the pixels in the image are loaded.
			Image temp = new ImageIcon(resizedImage).getImage();

			// Create the buffered image.
			BufferedImage bufferedImage = new BufferedImage(temp.getWidth(null), temp.getHeight(null), BufferedImage.TYPE_INT_RGB);

			// Copy image to buffered image.
			Graphics g = bufferedImage.createGraphics();

			// Clear background and paint the image.
			g.setColor(Color.white);
			g.fillRect(0, 0, temp.getWidth(null), temp.getHeight(null));
			g.drawImage(temp, 0, 0, null);
			g.dispose();

			// Soften.
			float softenFactor =-0.13f;
			float[] softenArray = { 0, softenFactor, 0, softenFactor, 1 - (softenFactor * 4), softenFactor, 0, softenFactor, 0 };
			Kernel kernel = new Kernel(3, 3, softenArray);
			ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);
			bufferedImage = cOp.filter(bufferedImage, null);

			// Write the jpeg to a file.
			FileOutputStream out = new FileOutputStream(resizedFile);

			// Encodes image as a JPEG data stream
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

			JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bufferedImage);

			param.setQuality(quality, true);

			encoder.setJPEGEncodeParam(param);
			encoder.encode(bufferedImage);
			
			if(out != null){
				out.close();
			}
			
			i = null;
			ii = null;
			resizedImage = null;
			temp = null;
			bufferedImage = null;
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (ImageFormatException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			System.gc();
		}
	}

}